static std::string computeDataLayout(const X86Subtarget &ST) {
// X86 is little endian
std::string Ret = "e";
Ret += DataLayout::getManglingComponent(ST.getTargetTriple());
// X86 and x32 have 32 bit pointers.
if (ST.isTarget64BitILP32() || !ST.is64Bit())
Ret += "-p:32:32";
// Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
if (ST.is64Bit() || ST.isTargetCygMing() || ST.isTargetWindows() ||
ST.isTargetNaCl())
Ret += "-i64:64";
else
Ret += "-f64:32:64";
// Some ABIs align long double to 128 bits, others to 32.
if (ST.isTargetNaCl())
; // No f80
else if (ST.is64Bit() || ST.isTargetDarwin())
Ret += "-f80:128";
else
Ret += "-f80:32";
// The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
if (ST.is64Bit())
Ret += "-n8:16:32:64";
else
Ret += "-n8:16:32";
// The stack is aligned to 32 bits on some ABIs and 128 bits on others.
if (!ST.is64Bit() && (ST.isTargetCygMing() || ST.isTargetWindows()))
Ret += "-S32";
else
Ret += "-S128";
return Ret;
}
static unsigned getRetOpcode(const X86Subtarget &Subtarget) {
return Subtarget.is64Bit() ? X86::RETQ : X86::RETL;
}
